Abstract
A new radiation chemical method was proposed for the recovery of depleted polytetrafluorethylene. It involves radiation graft block copolymerization of a finely dispersed polytetrafluorethylene powder with tetrafluorethylene or other fluorinated monomers and their mixtures. An integral dose of several kilorad. ensures the necessary 15–30% graft conversion without any marked any amrked after-effect of breakdown. A study was made of the dependence of the rate of recovery on dose rate, monomer pressure and temperature. Physical and mechanical indices of the recovered product exceed 1·5 –3·0-fold the parameters of control mixtures. The reclaimed product is processed into monolithic units by sintering the moulded products in the free state.
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